213630423 has 4 divisors (see below), whose sum is σ = 284840568. Its totient is φ = 142420280.

The previous prime is 213630419. The next prime is 213630427. The reversal of 213630423 is 324036312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213630419) and next prime (213630427).

It is a cyclic number.

It is not a de Polignac number, because 213630423 - 2² = 213630419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213630393 and 213630402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213630427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35605068 + ... + 35605073.

It is an arithmetic number, because the mean of its divisors is an integer number (71210142).

Almost surely, 2^213630423 is an apocalyptic number.

213630423 is a deficient number, since it is larger than the sum of its proper divisors (71210145).

213630423 is an equidigital number, since it uses as much as digits as its factorization.

213630423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71210144.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 213630423 is about 14616.1014980055. The cubic root of 213630423 is about 597.7978748515.

Adding to 213630423 its reverse (324036312), we get a palindrome (537666735).

The spelling of 213630423 in words is "two hundred thirteen million, six hundred thirty thousand, four hundred twenty-three".